On-

prefix

prefix ·Rare ·Advanced level

Definitions

Prefix
  1. 1
    on, at, toward, upon. morpheme

    "oncome, onset, onfall, onlay"

Synonyms

All synonyms
enepihypersupersuprasur

Etymology

From Middle English on-, from Old English on-, an-, from Proto-West Germanic *ana-, from Proto-Germanic *an-, *ana- (“on-”), from Proto-Indo-European *ano-, *nō- (“on”). Cognate with Dutch aan-, German an-, Swedish an-. Doublet of ana-.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.